<template>
  <div class="cartcontrol">
    <transition name="fade">
      <div class="cart-decrease"
           v-show="food.count>0"
           @click.stop.prevent="descreaseCart">
        <span class="inner icon-remove_circle_outline"></span>
      </div>
    </transition>
    <div class="cart-count"
         v-show="food.count>0">{{food.count}}</div>
    <div class="cart-add icon-add_circle"
         @click.stop.prevent="addCart($event)"></div>
  </div>
</template>

<script>
const EVENT_ADD = 'add'
export default {
  name: 'Cartcontrol',
  props: {
    food: Object
  },
  methods: {
    addCart (event) {
      if (!event._constructed) {
        return
      }
      if (!this.food.count) {
        this.$set(this.food, 'count', 1)
      } else {
        this.food.count++
      }
      this.$emit(EVENT_ADD, event.target)
    },
    descreaseCart (event) {
      if (!event._constructed) { // 自己派发事件为true,浏览器原生为false
        return
      }
      if (this.food.count) {
        this.food.count--
      }
    }
  }
}
</script>

<style lang="stylus" scoped>
@import 'common/stylus/icon.styl'
.cartcontrol
  font-size 0
  .cart-decrease
    display inline-block
    padding 6px
    opacity 1
    transform translate3d(0, 0, 0)
    .inner
      display inline-block
      line-height 24px
      font-size 24px
      color rgb(0, 160, 220)
      transition all 0.5s linear
    &.fade-enter-active, &.fade-leave-active
      transition all 0.5s linear
    &.fade-enter, &.fade-leave-to
      opacity 0
      transform translate3d(24px, 0, 0)
      .inner
        transform rotate(180deg)
  .cart-count
    display inline-block
    vertical-align top
    width 12px
    padding-top 6px
    line-height 24px
    text-align center
    font-size 10px
    color rgb(147, 153, 159)
  .cart-add
    display inline-block
    padding 6px
    line-height 24px
    font-size 24px
    color rgb(0, 160, 220)
</style>
